I think I got the rest of the inscription figured out. It is a dedication to Marcus Aurelius. But what does the last abbreviation, D.D.P., stand for?
The inscription is from a statue base in Caserma ...

In the Wiktionary entry about philematology, there is a reference to this book. The title is copied (AFAIK, but I can't load the picture in the previous link so…) as in the cover, that is:
[Jacobus ...

There is this title page of a "disputation" (a kind of academic thesis?), which begins with the abbreviation J.S.J.P. Because it is the first line, I would expect it to be some kind of benediction, ...

SPQR stands for "Senātus Populusque Rōmānus". It would be logical (at least in English or Spanish) to expect the initialism or acronym to be SPR. However, the first letter of the conjunction "-que" is ...

I came across a medal commemorating the coronation of Charles XV in 1860. The inscriptions on the medal are all in Latin. I am aware of a few latin abbreviations centered around the creators of medals ...

I'm trying to understand a paragraph from the 1806 transcription of latin legal texts from 1331, while being proficient at neither law nor latin. An example:
which is from page 78 of Placita de quo ...

I have been reading Cicero's letters in translation on the Perseus.uchicago.edu site, but check the Latin to improve my limited ability. Most of the letters include S. P. D. in the salutation, and I ...